HOLOGRAM MULTIPLEX RECORDING AND METHOD, AND HOLOGRAM REPRODUCING DEVICE AND METHOD

摘要

A hologram multiplex recording device multiplex-records a hologram in each of recording regions provided in a hologram recording medium. After a hologram is multiplex-recorded a predetermined N times in each of the recording regions contained in a predetermined range or in the whole of the hologram recording medium, a hologram recording is performed for the (N+1) time in each of the recording regions contained in the range or the whole. Accordingly, while another n (n=0, 1, 2, ...) recording regions are overlain in each recording region arranged in the hologram recording medium, the multiplex degree difference between the recording regions does not exceed a predetermined n+1 in the aforementioned range or the whole of the hologram recording medium.